3954181972 has 12 divisors (see below), whose sum is σ = 7452112276. Its totient is φ = 1825007040.

The previous prime is 3954181969. The next prime is 3954182027. The reversal of 3954181972 is 2791814593.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 686230416 + 3267951556 = 26196^2 + 57166^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38020929 + ... + 38021032.

Almost surely, 2^3954181972 is an apocalyptic number.

It is an amenable number.

3954181972 is a deficient number, since it is larger than the sum of its proper divisors (3497930304).

3954181972 is a wasteful number, since it uses less digits than its factorization.

3954181972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76041978 (or 76041976 counting only the distinct ones).

The product of its digits is 544320, while the sum is 49.

The square root of 3954181972 is about 62882.2866314513. The cubic root of 3954181972 is about 1581.3167962909.

The spelling of 3954181972 in words is "three billion, nine hundred fifty-four million, one hundred eighty-one thousand, nine hundred seventy-two".